
.contain{
  width: 100%;
}
header{
    height: 50px;
    width: 100%;
}
.body{
    width: 100%;
    margin-top: 20px;
    padding: 30px;
}
footer{
    position: absolute;
    bottom: 0;
    width: 100%;
    background: gray;
}
.header_span{
    /*vertical-align: center;*/
    line-height: 50px;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    font-size: 18px;
}
.myul li{
    margin: 0 15px;
}
.section_AddDerive{
    display: inline-block;
    float: right;
}
